Pre-Crisis Darkseid and Full Power Thanos VS. Abraxas
A fully powered Galactus is nearly on par with Eternity. Since these two can probably take down a full powered Galactus, can they face the consequences of their actions? Immediately after they kill Galactus, Abraxas rises from within Eternity and immediately seek out those who killed Galactus. Abraxas wanting to thank them and destroy them for their troubles.
Can these two take him?