A Jedi strike team is sent to the Death Star II to assassinate the Emperor and Lord Vader (ROTJ) as a last hope to save the galaxy. The team is led by Jedi Master Obi-Wan Kenobi and includes Galen Marek, Ahsoka Tano, Quinlan Vos, Kanan Jarrus and Ezra Bridger (All Jedi in their prime). Fight takes place in the Emperor's throne room.
Mmm, I was going to say that Sith wins because of Sidious but then I thought that IF Galen Marek can keep the Emperor busy for some time, and Obi+Vos+Tano+Kanan+Ezra don’t waste too much time to stomp Vader together, then they could gangbang Sidious and should win. Maybe
^
Legends only? So, should we use TCW!Ahsoka? That changes alot.
Mixed with more canon: Marek should be able to hold on Sidious for a while, Ahoska and Kenobi are enough for Vader, let alone Ahsoka, Obi-Wan with Kanan and Ezra.
Vos might be a really nice support for Galen, since his powers in canon are considerable.
Legends only: there is no Kanan and Ezra, Vos is a non-factor for Palpatine, Ahsoka wont be much of a factor as well. If Galen will fight Palpatine, that battle might even look cool, Vader might even die. But if Vader will take Galen, Sidious will blitz almost all others and stomps Kenobi shortly after. Then Marek will die.