I initially dismissed this as "yet more (tired) pulse rifle and aliens" meets LEFT4DEAD co-op in alien clothing.
But reading the proposal and seeing 3D Realms had worked on finishing and redesigning 2009s DUKE NUKEM Forever? The latter had criminally overlooked side-missions, non-shooting gameplay variety, vehicles and first person world interaction I say we've lost a great alien game
If you never played Duke Nukem Forever Razorfist explains his reasoning.
It would be interesting if 3D Realms ambitious proposal and listed gameplay features would've made it into the final release unscathed. That's without another A-CM scandal or unofficial reliance on independent mods or gameplay, graphical fixes.
With Disney closing production on making/marketing/premiering new AAA films and closing its park for a month due to coronavirus, I'd say Disney have better things to worry about.
I wonder if this game would've been more successful than Colonial Marines.
If by "success" you mean making money, then no. Many games (especially online co-op) are free-to-play. Heck even the full Counterstike-Global Offensive release has been free to play for over a year now.