Degrees of separation for Star Trek and Star Wars existing in the same multiverse.

[Granite]

You see, the biggest problem I have is... THERES AN X-MEN AND TRANFORMERS CROSSOVER!!! What randomness is this!!! Also, I feel like smash bros is either a limbonic dimension (basically everyone somehow exists within the same, singular universe), works freely through the interconnection of dimensions (which would explain the high number of Pokemon and Fire emblem characters since both cannonly use this. Also, Project X Zone 1 and 2 are good examples of this theory.), or it is the imagination of a child who grows up between each installment (this theory is supported by the first game and the fine tooth comb of MatPat from The Game Theorists.) The first two work very well and support all of those theories! But the third would nullify any connections through Smash Bros. Unless you consider the mindscape a multidimensional plane of fundamental existence, then you could work through beings like Bill Cipher to indirectly connect said dimensions. (But, to be honest, that would be far too complicated and uneccesary.

But, this is just my opinions and popular theories. And, of course, your first theory would certainly bypass the problems of smash bros. And I certainly applaud all the fact hunting you did to piece all these different paths of connections!