[dlkm]

it also depends on what two lines are crossed over. taking star wars and transformers and crossing them over was a brilliant move. if you take a look at the mythology of both lines they can be compatible. by that I mean that star wars takes place in a long time ago in a galaxy far far away and transformers have been establised as living millions upon millions of years and it has been established that some transformers have left cybertron, either to escape the war or if you follow the current mythology to find the allspark . so really there's no reason to believe that they couldn't have ended up in the star wars universe.

the same can't really be said for the marvel or disney crossovers . lets be blunt , neither donald duck or mickey mouse are fighters . why would the hulk need to be a tank to smash things? why would thor need to be an airplane when he flys because of his hammer.

If one were to do a superhero crossover line it would make sence to do it with a superhero who actually uses vehicals . the best example I can think of would be if a transformer copied batman's vehicals (batmobile, batcoptor, batwing , batboat, batcycle, redbird.) you could suspend your disbelief because he actually uses those vehicals .

as stated before it would also work with gijoe becasue they have already crossed over in comics