I'm not calling it bland, but you can hardly deny this seems to come from the same movie generator Thor 2 was spawned from.
Both villains are scheming to destroy worlds using infinity stones with no other goal in particular.
The bad guys' henchmen are all clad in black/metallic armor wearing masks that make them a nice faceless/indistinguishable army.
See also The Avengers:
Both feature spaceship battles where the bad guy is trying to invade a planet and has to get through a yellow force field. Unfortunately no reference picture from GotG but I'm sure you remember the scene with all the Nova Corps ships interlocking. And from Thor 2:
And the heroes not only have to deal with the bad guys (Malekith/Ronan) but also a thorn in their side who has a more personal and conflicted rivalry with the hero, sometimes helping him, sometimes betraying him.
But other than these examples, and the fact that the hero is joined by a merrily band of warriors, the bad guy's spaceship crashes into the ground, both heroes' mothers die and there only being one black man in either universe, they are entirely different movies whatsoever.