Wait wait what.
2010? Jizzy alive? Catalina alive? GTA3 era and IV era characters all mixed in? I've got to say this is pretty unexpected. But it sounds like it's going to be very good. You have posted a video which makes it sound like it's going to be a nice mission pack. The story might have fan-fiction quality though because of some characters not even supposed to be alive by 2010, but I can scratch that if the missions are fun to play and if the story itself is good enough.
Wishing you the best of luck for this mission pack.