With the Switch being as hot as it is, I doubt it. The New 2DS will help make it close (cheap plus model with a huge existing library), but I have a feeling the 3DS is on its way out.

The 3DS line was Nintendo's plan B if the Switch flops. However if things continue as they are, Switch will be the feont runner for both handheld and console caliber games. And lets be honest, thats what most of us want to Switch to pull off, am I right?

GBA kinda got screwed if you think about it. It really should be the second highest selling Nintendo system of all time after the DS. 82 million LTD, but that would be more like 110+ million had it not been prematurely cut off.

No. The 3DS sales have slowed, and rightfully so. It's already been out for 6 years, and has few heavy hitters still in development I would imagine. Releasing another Pokemon generation on the 3DS would be ridiculous and harm the Switch.

Nintendo's best strategy at this point is to ease out of the 3DS, and stop all hardware and game manufacturing after Holiday 2018. Nintendo should then release the rumored Switch Mini in 2019. 2019, with the 8th Generation of Pokemon available at its launch.

It's possible but not likely. That's ok though, just look at the numbers. It's a dedicated gaming system in 2017 and the GBA was cheaper. Whatever it ends up selling it's quite an achievement.

I dont think its possible for 3DS to outsell GBA.

Basically that would need 3DS still to sell until at least holiday season 2018/2019 and to be honest I dont expect that coming. Not even sure if 3DS would achieve GBA LTD numbers until then, probably it would need even until holiday season 2019, so 2.5 more years on sale.
3DS had not even sold 15 million in complete 2015 and 2016 combined. And in 2017 3DS is selling even less than 2015 and 2016.

2015: Week ending Jan 3rd to March 28th about 1.9 million (total year: 7.3 million)
2016: Week ending Jan 2nd to March 26th about 1.1 million (total year: 7 million)
2017: Week ending Dec 31st to March 25 about 0.9 million (total year: we will see^^)

--> voted for [x] No

That's because of shortages in the west after selling out on holidays...   I won't link you a specific article as I was used to do to other people that were commenting on  the current 3ds sales like you, just see the search results...

https://www.google.gr/#q=3ds+sold+out&spf=1

Read polygon article for full details, also the verge one to see that Nintendo hasn't even restocked it as of February ( Not even in March as I figured out from browsing to major american retailers eshops ) they ship a specific amount of units...

Also, see these interesting diagrams from Nintendo. they  can enlighten you...

Nintendo means FY15/16 vs 16/17 but they use here the just year when it ends. ( March 31st )

Pokemon go

pPokemon go and sun/moon

Of course Nintendo didn't expected this boost, and then when they saw it, they underestimated it its duration...

Original forecast was 5m for 2016, they had to revised up by a lot it two times... They sold 7.3m ( Fiscal year, not calendar ) !

Nintendo production encountered issues for obvious reasons... Way higher demand than the expected for 3DS and preparation for a newly console!

I have my doubts. The system would have to be supported for a few more years, and I feel it won't go on longer than 2. So either it continues to sell well, or gets some killer games towards the end of its life. Otherwise, I don't think it will.

After a fair amount of thought i voted no but i think it's going to be very close! It really depends on if Nintendo meets their latest FY projections and where the next pokemon goes. I think Nintendo will gradually divert all their resources to the switch but are holding on to the 3ds for just a little longer, trying to eke all the sales out of it for as long as it can. Although, doubtless Nintendo will have their market analysts watching 3ds family performance very carefully. In the long term it would be a disastrous business policy, keeping the 3ds alive for too long. It could seriously affect the long term growth of the switch, which realistically should be Nintendo's long term priority. They really won't want to have two competing consoles out there on the marketplace. Imo it would be foolish not to have the next iteration of mainline pokemon on the Switch, at least in some capacity but the last thing Nintendo would want would to be any cannibalisation of any of its products, especially by 2 of their own competing in their own marketplaces.

So, for that reason i predict:- E3 this year a brief snippet of mainline pokemon shown for Switch but left shrouded in mystery. Stars actually announced for this year for 3ds. Later on in the year, revealing that Pokemon stars will be a split release for both consoles, the switch version being obvs. better graphically and with more features but the ability to "communicate" between the 2 systems. The Nintendo market analysts will then monitor the market trends and plot strategy from there but i believe the most likely outcome will be for Nintendo to quietly drop the 3ds line sometime in 2018/early 2019, to narrowly miss their prediction of 6m 3ds up to March '18 by perhaps 1/2m. So LTD sales would be about 71.5, then with dwindling support the following years would be something like, 3.5m, 2m, 1m, 0.5m (the last year of any meaningful sales), so ending up just shy of 80m. Of course if Nintendo decide to support it for a little longer, it could do it but i very much doubt they would risk the future of the Switch in doing so.

What...

So oversimpled conclusion...

DS replaced it its 4th year... Software-wise GBA was receiving big games until late 2006! 

DS lite killed GBA in 2007 ( albeit it still sold 2m then, you have a somewhat wrong notion about how much fast gba sold the 82m ) , GBA sales were affected by fat ds only in Japan ( as it usually happens with  consoles that being  succedeed there, unlike the west ), in the west it kept selling very well, outselling fat ds... So stop it! GBA wouldn't pass 100m...

It's selling pace wasn't for 100m, its best fiscal year was 17.5m! 100m+ sellers at their peak year sell 20m+...

If you want add to GBA sales what FAT ds sold in two years 17.5m...

The just need two heavy hitters to be exclusive to New 3ds/2ds to tempt some og non xl/xl owners to upgrade...

Although, they might be fearing the reactions on such a move, or the fact that game would miss sales by skipping the large installbase of the old models and the installbase of new models isn't enough, but in the end profits matter... Nintendo makes more money on hardware...*

*A paradigm: 9m consoles with profit margin of 50$ and 3m software with profit margin 15$ is  495m$, while 6m hardware and 9m software with same profit margins is 435m$....