You can see here http://genesismini.sega.com/ what games are coming for the Genesis Mini. So far they've revealed 30 games, and have 10 left to show. I can't think of much of anything that's missing from the library. All previous mini-consoles were missing pretty big games. SNES Mini was missing Final Fantasy II, Chrono Trigger, Donkey Kong Country 2-3, Kirby's Dreamland 3, Mystical Ninja, Terranigma, and a few more. Sega on the other hand is giving us 40 games, not a mere 21 like the SNES Mini. Obviously Sonic 1-4 will be there. Since Shining Force is there, Shining Force II must be one of the unannounced games. This console is packed with a crapton of games that cost $40 or more in the wild. 

The best Castlevania up until SotN came out. This game is pretty rare in the wild. I've had my mint copy for years and only seen one or two others, in 15 years of shopping around multiple cities for games. Even a cart-only copy is hard to come by. 

Treasure's classic random shoot em up. Best as a two player game. Being able to toss enemies was fun as hell. 

A solid Shoot'em up. This is another hard to come by game. Genesis Shoot'em ups were amazing, because of the faster processor. 

The best Contra game ever made! The name comes from the game being brutally difficult. 

It doesn't really matter whether or not we get Phantasy Star I-III, because this is the best one. The others have aged poorly. 

One of the few I don't own. I'm playing through the current Monster Boy game, and I gotta say, I'm excited to try this one out. 

All of the Disney games on SNES/Genesis were good. This is the best one though. We're getting both this, and the sequel, which I've never seen in the wild. 

Sega's Answer to Zelda. A hidden Gem for sure. 

The only two games, I can see missing from the Genesis Mini are Dynamite Headdy, and Ristar. 

Yeah, that's always been the issue with Genesis vs SNES. A single SNES game can be as much fun as three Genesis games. For example: Super Mario World's 72 levels  is more levels than all four Sonic games combined. 

I still think Genesis Mini will be a better Mini console, because it isn't really missing anything, while other mini-consoles have come up short in the past. IMO a mini-console should have every classic game for the system included in it. If I were doing a mini-console I'd expand the list to 60 games, just to make sure nothing was missed and everyone were happy. Besides it's not like these games had large file sizes or anything. 

"Obviously, Sonic 1-4 will be there"

Will they though? We only know of Sonic 1 and 2, and 3 like never shows up these days, even on Sega licensed products and software. Sonic & Knuckles maybe. And sadly I don't think we're getting Shining Force II which is much better than the first.

But yeah, it'll be a better value than the SNES Mini for sure. Square must be really greedy with their licensing fees or Nintendo just wasn't willing to pay or make it a part of their vision for the SNES Mini. Because Chrono Trigger definitely should have been there. Mystical Ninja/Ganbare Goemon Yukihime Kyuushutsu Emaki was on the Japanese version but not on the others which is a strange decision imo. It was a great 2 player game

The driving force behind there retro mini consoles, for me, is nostalgia. I played a few Genesis games and even owned one later in life but my heart belongs to Nintendo. I've even recently become aware that certain Genesis games were better than their NES counterparts. Doesn't matter. I just don't have that nostalgia.

It could come packed with the entire Genesis library. I'm just not in the market for one

It will be in the top 3 for sure

The only problem i ever had with Sega genesis was all the multiplate games. Like Street Fighter 2 Turbo is better than Sega's CSE. Mortal Kombat II-?? are all better on the SNES graphics, colors and controls.

One thing I dont get about this mini console is why are they releasing the 3 button controller? I thought sega later on did a 6 button one to compete with the SNES? Since a lot of multiplateform titles used all 6 buttons

Street Fighter 2 will play like ass on a 3 button controller. But SF2 doesn't mean much, because true fans will get the HD Remix version, that beats the pants off any arcade/genesis/snes version from the 90's. 

Hell yeah I'm getting it. Glad they kicked atgames to the curb with their shitty emulation and put badass M2 in charge.  Like others disappointed they are putting 3 button controller instead of the 6.  Prob only questionable move so far.

What other console can you do this!

It only took them how many tries to get it right? I'll wait for the reviews. They're put out too many of these with AT Games for me to trust without the final verdict