Hypothetical war and how it would turn out
Note: anybody that wants to rationally and nicely try and prove me wrong is welcome to do so, but don't quote this thread and then respond to it with an irrelevant, unsupported "zomg that's all lies and you're an idiot!"
For balance sake, this won't take into account superweapons, since if we were to take that into account Star Wars would win quite handily.
Week 1: The Federation consists of about 150 planets, and most of the other Star Trek factions have similar numbers. The Star Wars coalition could therefore send one star destroyer accompanied by enough transports to fit 1 million men and supporting vehicles and supplies for an occupation to each of these planets. Occupation would be easy as defending fleets would not be a match for 2.4 million megaton turbolasers firing from thousands of miles away.
Month 1: With the Federation, Romulans, Klingons and most other Star Trek civilizations neutralized, remaining colonies and fleets will be trapped without any resources and forced to surrender. Any attempt to counterattack would surely prove futile against superior Star Wars forces.
Month 2: With most of the Star Trek civilizations defeated, the two major survivors would be the borg and species 8472. A powerful Jedi such as Luke Skywalker as of LOTF could mind read a borg drone and figure out the location of the transwarp hubs, or probe droids could be sent. Either way, fleets of star destroyers could easily destroy the transwarp hubs. Meanwhile, the borg and species 8472 may try and counterattack, but even these two are heavily outmatched and would not be prepared for starfighters. Borg cubes were harmed by 1160 megaton weapons would would get destroyed by a single volley from a star destroyer with hundreds of 2.4 million megaton turbolaser blasts.
Month 3: With their transwarp hubs destroyed, the borg will not have the capabilities to attack Star Wars planets without taking decades to do so. Species 8742 would be the only threat left, yet even they would fall. The borg were capable of harming species 8472 ships, yet Federation starships were capable of taking hits from borg cubes, showing that species 8472 ships can get harmed by weapons that are clearly not anywhere near 2.4 million megaton weapons.
Star Wars wins.