I regret to inform you that you are looking for a unicorn. It would have to be a team of devs/artists at the minimum, then I could potentially see it happening, but getting that off the ground is not exactly easy without funding. The problem is, funding isn't easy to come by in a space that often is associated with vaporware. Even if you do get a credible group of people together, most people wouldn't front the money to fund the development of it until a patreon can get rolling into sustainability levels.
Pretty sure every business requires funding whether it being sponsored, or devs themselves fork out their own money. But what separates this specific title (dota 2 porn game) than usual business is:
The negative:
1) The ethic and the stigmatization of porn that turns most devs off as it cannot be used to strengthen their resume even within the game dev space.
2) Porn Game Devs, dont' get company benefits most of the time. Insurance, tax cuts.... etc... depending on the country.
3) Getting said group of people working together for the long haul can the most challenging part of the dev process be it the programmer or the artist with artist being more obvious to the public attention given the obvious change in art direction. So I agree with you on this one. P,S it is not impossible because I myself am a software engineer, and my network allows me to find artists, riggers, 3d modeller, animators pretty easily cuz it's where I studied, we have events that get people working together for projects or competitions... The reason why i was deterred from delving into the porn industry, despite its easy money, it's because point #1 and #2 and I'm not desperate enough to need the additional income.
The Positive:
1) With substantial quality that is set at a pretty low bar for it to start generating income be it not as much as what Titdang is earning now. It's relatively close to being entry level work. A few interns from each game dev category can kickstart it even at a low cost to none as long as it shows that it is promising. Also, do note that it has taken Titdang years to get to where he is now and that is with the egregious monetization, I am pretty sure that his followers do not appreciate what he's doing either, if they are offered with a different monetization plan that is more reasonable, I'm 100% sure, they will take it.
2) This is a guaranteed success should the quality of the game meets the public expectation which is set at a very low bar thanks to Titdang's current project/game. Because of this, the team in which required to work on the game doesn't really need to be a big one. It can easily be a side income for many developers should the project is managed correctly.
So for those who are like beginning in the game dev industry, and desperate for money, I think making another game similar to what Tit dang is offering that its setting is based on well established IP (Just don't touch Nintendo's property) can be pretty profitable. Just look at Rogue Like (X men), This game (Dota2), Something Unlimited (DC Universe) etc..