These are all great choices.
I absolutely LOVE Treasure's game library, but I feel like we have already covered Treasure
a lot in Together Retro. Don't you agree?
On the other hand, Rare is a company that we maybe have not given a lot of playtime in Together Retro. Much like Noise, I haven't given sufficient playtime to my Rare compilation on XBOX One. I also get the chance to plow through Donkey Kong Country on my SNES mini.
I really love the licensed 2D platformer idea. There are tons of great hidden gems here, plus most of this would be super easy to emulate. Also, this covers a bunch of the Treasure games that we
haven't already played for Together Retro already. Plus, I've always been a sucker for puns. "Licensed to Thrill"

Let's do it!
Legend of Zelda clones is also a neat idea, but I'm not sure I can commit the time to play multiple games in this vein. I would probably wind up starting a bunch and never finishing knowing me
Ultimately, I'm voting for Rare and Licensed to Thrill.