Before you say rebels is shit...
Rebels is definitely not like the clone wars sadily, but it does have intresting and original characters. Although it's more like a kids show, however look at clone wars in its 1st two seasons. And they are going re-canonise many thing (hammerhead frigates, sith holocrons ect).
What character would you like to see come back into canon?
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Haven't watched it, won't bother to. Especially after them trying to tie force awakens to it by giving the kid a crossguard saber.