So most people seem to agree that the 3DS successor will release in the next couple years, I would say Spring 2016 at the earliest and Spring 2017 at the latest. If this time frame ends up being correct, what will the big launch titles be?

3DS had a pretty poor launch window, the biggest launch title was Nintendogs+Cats and went on to have a pretty big drought where Ocarina of Time 3D was the only big release for about 6 months. That on top on a high launch price really hurt early 3DS sales. If Nintendo wants their next handheld to come out with a bang, they will need a strong launch window.

I think the next handheld will release in Q2/Q3 2016 with Animal Crossing and Luigi's Mansion 3 as the big launch titles.

If they have Pokemon as the launch title there's nothing they have to worry about.

http://gamrconnect.vgchartz.com/thread.php?id=197588&page=1

That thing + Pokemon plox

A mario game and Pokemon would be enough.

Mario + Pokemon + New Blockbuster IP

That's not how IP works. 

what do you mean? 

IP stands for intelletual property. Both Mario and Sonic are seperate IIPs. So if you combine them you aren;t making a completely new UP. Just combining two already made ones 

I'm not combining the IP's.

I merely meant, I think there will be a Pokemon game, a Mario game and New Blackbuster IP at the launch of the 3DS successor.

Launch - Late April-June 2016 (Japan)

Animal Crossing
F-Zero
Third Party Stuff

July 2016 

SMT x Fire Emblem (also on Wii U)

August 2016

Super Mario Galaxy 3

October 2016

Luigi's Mansion 3
Monster Hunter 5

Nov/December 2016

Mario Kart 9

Animal Crossing for day 1. Mario Galaxy 3 to kill any 'post-launch drought'. I think it will make they have a really strong launch this time, that's one thing they can control and I think they learned some very bitter lessons with the 3DS and Wii U about that. Can't f*ck around this time.