Character idea: Redeemed Vader aka Infinities Darth Vader

With the reveal of Dark Side Rey coming soon to GOH, another similar character which would be great to see is Redeemed Vader aka Infinities Darth Vader or White Armored Vader.

First appearing in the Infinities Return of the Jedi comic series, with Palpatine escaping the 2nd Death Star's destruction and Luke and Leia able to redeem Vader, Vader decides to join the Rebel Alliance to help hunt down the Emperor. Vader also has his armor turned white to represent his redemption. His Black Series action figure depicts him still wielding his red lightsaber. 

Despite the Infinities series set in an alternate timeline, Legends is regarded as an alternate continuity too with Legends exclusive characters Kyle Katarn, Darth Talon, Darth Malak, Darth Malgus and Mara Jade already present in the game.

Redeemed Vader could also be the first character introduced to GOH representing the Infinities series.