It's not weird at all if you factor in SR7's history. The fact that SR7 is still working on Something Unlimited is nothing short of miraculous being the man leaves so many failed projects in his wake. In his entire history of drawing porn on the internet SR7's completed works are a handful of Superman shorts and Bend or Break 1 if you can call that complete since it also doesn't have everything he promised it would. That's all. He made two separate attempts to make a comic based on Rogue from X-Men Unlimited and failed to complete them, he started work on dozens of image sets, comics, and so on but always abandoned them after a handful of pages if they ever even got off the ground. Even Something Unlimited is never going to be the game he actually promised when he started out. He's been milking it for around seven years and the current product has exactly one finished thing in it: the first yacht party. The prison break, nanda parbat, Maxima's planet, the halloween party, the prison break, the wedding in Kasnia, and now Themyscira are all unfinished. It's not a project management issue it's an "SR7 gets bored after a couple updates and he has no one to keep him on track." issue.
The only way the Gotham event will be "finished" is if he keeps it to the characters that have currently been introduced and if we accept the fact that one of them is probably not going to get content. This next update could be the last one before he starts swapping back and forth between SU and Bend or Break 2 so adjust your expectations accordingly.