Heretic of The Seventh Circle
I don’t think this tells us anything about the TTRPG line. It just tells us that they don’t care if cartoons and comic books change “canon”.They already did develop more then two different storylines for their MtG settings. Its established that in the MtG cartoon (if it ever happens), its a seperate timeline, Gideon is still alive in it.
The Boom Comics timeline is also set in a seperate timeline from the main MtG setting, its own story.