I guess that's my worry.
I've never published a game before. I'm about to finish my first game, that I've been working on for years now.
I've brainstormed with friends to cultivate the ideas that make up the game. Because I brainstormed with friends, are the ideas still mine? And if the ideas don't belong to me completely, do I have to share the hard work with those who helped develop the ideas?
Maybe I'm overthinking this all.
How involved are your friends? If they're your team mates, then it's only right to split revenue equally. But if they're just idea people that don't want to do any work or aren't able to because they don't know anything about game dev... I mean you can put their name in the credits or something, that's worth something isn't it? ;3
I'd say just keep doing what your doing. It's a bit unreasonable for someone who just said "It's minecraft but tetris!" or something and expect to be compensated just for that... I've had some friends of friends who know I make games go like "I have an idea for a game, it's Call of Duty but underwater!" or something and expect me to be like "wow let me make that game for you!"
This is a bit off topic but you ever have someone who tells you an idea they had, you tell them it's good. Then they probably expect you to help them/do all the work for them but they get disappointed when you tell them "now you just gotta' learn how to make it!" -_- I know it's not easy learning how to do a variety of skills to make games but like why would I work on someone else's thing for free when I've already got more games in written down than I realistically can make in my small amount of time on this planet.
Anyway from what it sounds like you should be okay- as long as you don't have unreasonable asshole friends who think they deserve 50% of the game money because they said literally only just "What if... you play as the SLIME from dragon quest and the final boss is the HERO!?" and then you toil away for a couple years, expanding on the idea, making the graphics, music, programming battle and menu systems, writing the story, testing it, marketing, etc... making that game and it turns out to do okay sales wise. (btw that game has probably already been made several times already, its just an example)
Btw, collection of free ideas for all to use-
"Break out but the projectile is jizz and the blocks snowball the jizz and spit it back out at the paddle before being destroyed"
"What if... you play as the SLIME from dragon quest and the final boss is the HERO!?"
"Breakout but also mine craft"
"Zork battle royale"
"Deadly Premonition but it's twin peaks"
"Open world break out"
"Final fantasy 3 but with turnbased breakout combat"
"Myst on a Halo ring"