Ultimately, it is as you said, there is more to be announced. Nintendo hasn't put everything out there yet and we'll probably know more of what's to come later on in the year and beyond when they're ready to announce more. Nevertheless, I have to say that seeing what's going on this first year for the Switch in terms of first party, I don't know what launch year first party lineups of consoles' past matches up to that. Sure some have great launch lineups, but for the whole year?

By that logic, Xbox is the epitome of that problem. Honestly, why does it concern you so much that only 2 first party games have a 2018 release date? We're only halfway through this year (2017) and you're already jumping to the conclusion that there's a "problem" with 2018? We've seen already that Nintendo will eventually deliver on first party IP, as all their studios are pretty much working together to make games for this system. Out of the blue, there could be an Animal Crossing game, a Smash port, Mario Maker 2/port, the list prolongs. Pikmin 4 and Fire Emblem 2018 are definitely going to be for 2018, as Pikmin 4 has been "almost finished" since 2015. It's likely going to be revealed in a Nintendo Direct.

Just wait, please. This discussion is way too early.  You're probably too exercised by Sony's 2018 delays to have such discussion. Nintendo doesn't operate like that, sometimes they announce a game a few months before release. Sony doesn't do that.

No one cares about you not caring. Fact is Nintendo had the least amount of games and has the lowest average score for it's top games. Had the least amount of 90+ games, least amount of 80+ games. Had the least amount of successful IPs, and by far the least amount of New IPs successful or otherwise. I understand that there are people like you who love everything Nintendo and don't care for anything by anyone else, but barring that kind of biasedness, there's no way to argue againt the fact that Nintendo has the worst first party games.

Kirby and Yoshi are not only games for 2018. we know about, we also know that Fire Emblem is 2018. game and Nintendo talked after E3 like Pokemon and Metroid Prime are 2018. games. Of Course we still know nothing about majority of Nintendo 2018. Switch lineup. But for now, we dont see any bad sign.

Pokemon and MP4 are not 2018 games.
GoNintendo posted an updated on that news where they said they were contacted by Nintendo to correct that Nintendo's guy statement saying that those games don't have a release date. As in, someone gave a wrong info.

So, when i see them announcing 4 games at E3 and two of them not even being 2018 games, i can't see that as a good sign: they could have revealed 2 more 2018 games instead of Pokemon and MP4. Why didn't they do that?

Pokemon and MP4 are not 2018 games.

So, when i see them announcing 4 games at E3 and two of them not even being 2018 games, i can't see that as a good sign: they could have revealed 2 more 2018 games instead of Pokemon and MP4. Why didn't they do that?

We regularly hear about Nintendo's third party software issues which are legit but maybe not as bad as people think.  How about the first party problems?  Switch started off extremely well with Zelda: BOW and Mario Kart 8, but I am starting to sense cracks in the upcoming lineup. 

Keep in mind, I'm looking at this from a sales perspective (I'm on VGchartz after all).  I know I'll buy a Switch and love many of these games, but to sell 100 million Switches they need outstanding first-party software.  Wii know they can do it!  Let me know if I missed anything.

ARMS - seems to be having a so-so launch, I don't expect this to do much.  It is nice to see Nintendo try a new IP, though.

Splatoon 2 - looks fine.  I can't figure out what makes this better than the first game, but Japan loves it, and I think it'll be interesting to see if this can do bigger numbers on Switch than Wii U.  I'm not worried about it.

Mario Odyssey - I am worried about this one.  Nintendo really should be going 2D with Mario, the proof is in the sales figures.  I was giving Odyssey the benefit of the doubt because Nintendo made great strides in open world with Zelda, but I think the game might have serious issues with the cornball theme song and strange mix reality and fantasy.  Nintendo needs Mario to perform, they have no other guaranteed hits until Pokemon.

Xenoblade Chronicles 2 - This will add some nice variety to the lineup, but we know this isn't a system seller.

Fire Emblem Warriors - Good for Japan, but not a system seller globally.

Metroid Prime 4 - this will add some needed variety to the lineup, but I'm concerned to hear it's not coming from Retro.

Pokemon - nice, it will ensure great sales for a while as long as they deliver.

This is where it gets risky - does anyone think MP4 or Pokemon will be out first half of 2018? If not, what will carry momentum through next year?  I have little faith in the 2017 game lineup to do that job (Zelda and Mario Kart maybe, but they'll be a year old).  Ironically, I think Skyrim and maybe Rocket League will do as much to save Switch in 2018 than anything Nintendo has scheduled.

If I would have to take a guess it's because Yoshi and Kirby are pre E3 2018 releases. Fire Emblem Switch is probably post E3 2018. 

Those two titles also are massive hype builders, and I am somewhat sure that the Pokemon announcement was made in response to the backlash post Ultra Sun and Moon

You don't know that, Nintendo did not specify any release date or year, they just said Switch Pokemon will need more than a year, holiday 2018. is almost 1.5 year from E3 2017.

Lol, I now remember, we already had this arguins. E3 proved you were wrong, they did were talking about some 2018. games even some games that could be beyond 2018. despite they said E3 while focused for 2017. It very clear, but you still asks why!? They could revele hole 2018. lineup but they didnt of course because they don't need, same like they did not need reveal hole Switch 2017. linuep in January event, or they didnt reveal Switch year before launch...

But why they announced Pokemon and Metroid!? It's very obvious, after Pokemon announcement for 3DS, people are asking for Pokemon Switch and they feared there isn't Pokemon for Switch, Nintendo just give confirmation that there is Pokemon Switch in development. Fans were asking Metroid Prime for years, and if they did announced just 3DS Metroid game, fans would angry, again Nintendo just gave confirmation for Metroid fans.

So no, we don't have any bad signs for 2018. we are just in middle of 2017. and we already have 3-5 announced games that will be released in 2018.