So in this week's Thunderbolts, Jeff Parker builds issue plot around roster alteration.
He's been doing it for the last few, with the introduction and quick removal of a very unstable Hyperion (or to hear him say it to Man-Thing, "Monster, I am KING HYPERION!!") and the for-now more permanent addition of Satana Hellstrom (as occult specialist.)
This issue continues that, featuring the government-mandated creation of a backup team (dubbed cleverly, if not charmingly, by Moonstone as "The Underbolts"), which promises to be fun; at the very least, the Shocker and Mister Hyde and Centurius are potentials.
( Also, the A-team is sent to deal with a mysterious magical German castle.. but first, they've got to meet their new friend. )