Seance: Has to be either Doctor Strange in Jean Grey or something to do with young Beast dabbling in magic. I do wonder which of the dead will be conjured.

Negative: The Negative Zone arc in Gold with Guggenheim's character.

Switch: Legion?? That's a stab in the dark. If not, I imagine it's just a roster change somewhere.

Mother: Has to be the Mothervine story being told in X-Men Blue

Red: Probably just refers to Omega Red. Hopefully refers to the Red Queen (Madelyne Pryor)