One of the things I've noticed about this game is how similar SG's situation is to SFxT's situation. Both games had terrible launches, but both games also gave updates that made themselves really solid and fun games. But regardless of the updates, everyone in the FGC has made up their minds about both games one way or another a loooooong time ago.
The only thing that separates the two games is that, while Capcom tried to cash-grab and nickle-and-dime their customers with SFxT, Lab Zero has done everything possible to do right by their fans and the FGC, making constant updates, giving new characters away for free and going to the point of making drivers to make PS3 sticks compatible with PS4 sticks. That, in my mind, is the main reason why SG is still clinging to life while SFxT is dead as far as I can see.
About the future of this game relative to the rest of the field, I'll list a bunch of assumptions here:
- Marvel 3 is not going to die. Guys like Viscant, F-Champ, and the House of Chaos will make sure that it won't die. As much as I don't like that game, I have to give their community all the credit in the world for giving all of their blood, sweat and tears to keeping their game alive.
- If any Marvel 2 veterans haven't picked up SG at this point, they probably aren't going to now or in the future. Again, they've made up their minds about SG already.
- Xrd and the US version of UNIEL are on the horizon. Then we have to consider what'll happen once a new KOF comes out... there's no way SG can compete at that point.
- When Indiegogo funding runs out, MikeZ can't update the game anymore. Yes, it's uncertain now, but for now I'll just assume that Mike has to move on once RoboFortune comes out.
With this in mind, 10+ years is a bit too much to expect... I'd give the competitive scene 6 months once Robo Fortune comes out.