I'd stated in a previous post in this thread that I didn't know much about Otherworld or how it worked. I wasn't even sure if Ireland was part of it.

So,I did some digging around about Otherworld just out of boredom. And re-read some comics.

It turns out that the Celtic Gods that Morrigan is part of actually live in Otherworld. So if Terry has followed Morrigan's path and taken that as her home, then it would seem that an Excalibur comic that deals with Otherworld and mutant magic would be a logical place for her to show up, if she does appear anywhere. Not as a cast member as she isn't included in the comics roster, but maybe for one story arch. Or, maybe as a slightly reoccurring support character.

I still don't like the idea of Terry being Morrigan though.
Sorry Morrigan fans.