The team is coming together and we see more of Ross' recent past before he formed the team.
However the end was a bit of surprise in terms of what lines Ross will cross (bad rhyme I know). ROSS is restoring the LEADER!
Apparantly the Leader will be red, therefore he will be 'The Reader'.
The book is obviously an 'ends justify the means' type book with a team of people morally ambiguous enough to do whatever needs doing, so compelling a villain to work for them fits and also fits with the whole concept of Thunderbolts.