Getting back into t-shirt design after a looonnngg break. Here are a couple Star Wars mash-up designs I did on holiday for feedback:
Empire Assimilation (The Empire vs the Borg):

Light of Tatooine (Star Wars & Transformers)

Be seeing you,
Peaj
Empire Assimilation (The Empire vs the Borg):

Light of Tatooine (Star Wars & Transformers)

Be seeing you,
Peaj
also, keep in mind that you are designing for a shirt, not an arbitrary square. be conscious of the way it will lay on a shirt. contemplate your borders carefully.
The Rebels are in the upper right corner, fleeing the scene - which is the Borg interrupting the Death Star destruction of Alderaan.... agree, way too much for a t-shirt, but i'm assimilating into another thought!
think this would go best on a black shirt