1) I do not have a guess in terms of number of pages, but I believe it'll just be Act 1 or a majority of it.
2) Good, hopefully.
3) I don't think it'll be a 1:1 retelling, so it's possible some things will be shown a lot earlier (which I think, depending on how it's done, could be better.) Plus, having future things teased in a pilot would help get people interested in it.
4) Was it not said to be about eleven minutes?
5) It would be really funny.
6) There is no way it doesn't happen and I'm scared to see Digital Circus Homestuck Friday Night Funkin Spider-Man Sing Along. Content farms still use Spider-Man, right?
7) Hard to say, since alot of people like alot of different things. Some may like it a lot, some may hate it. It's possible it'll suck ass and general opinion will shift to hating it, but only time will tell.
10) I think you forgot a few numbers here. Did they go on vacation? I hope they have a nice one. Anyway, I think it looks pretty good. The voice acting's alright as well, nothing to freak out over. Toby Fox being there's fun.