Lightning Rods show up while T-Bolts fighting Hulk robot. But the robot disappears, leaving behind Graviton, who is quite pleased to be back on Earth. Graviton quickly defeats the Lightning Rods and the T-Bolts.
Citizen V vs. Zemo.
Erik deals with dead brother, decides to return to help the T-Bolts, which he does. Graviton takes off. As do the Thunderbolts.