A lot definitely happened in JLI. Most of the first issues I've read have been slow, setting up characters and settings for the future of the book. But JLI definitely delivered. In 20 pages, we get to see the reasoning behind the formation of the team, the public opinion of the team's formation, picking the team members, and sending them out on their first mission. Lots of good stuff.
But I would almost say that the issue had a little too much going on. There are characters that have always been C- and B-listers that need more panel time, but they don't really get it. Vixen is in the issue, but didn't do anything the whole time. I kinda forgot she was there.
Overall, a good start. I'll definitely be continuing with this one.