Unless we get access to magic portals i'm gonna assume that a return to Tel'Adre is a no. (Bit of a note, when I first played CoC and found it, I had Morrowind nostalgia. You can guess my chosen great house from that)
Anyway, outside of visiting Tel'Adre, getting a companion from Mareth would be interesting so as to get some cannon conclusions of the storyline.
Another thing, if we do get to visit Mareth/Tel'Adre, is a character import thing for say a statue of our CoC1 character(given all the effort involved with such an import system, including character variations, i'm gonna assume a no to this as well, but it doesn't hurt to state a desire)
And finally, companion customizability on the scale of Terry from FoE(I did read earlier that Terry's creators are a bit of a sore subject, but his customizability was one of my favourite facets of his character. I am NOT asking for the character himself, especially seeing as how he shouldn't exist yet in this timeframe given its only been one year since CoC and thus Terry, who is of close age to Cassidy, Helspawn's grandchild, hasn't been born yet. I think my chronology of the situation is correct, although feel free to let me know if its not)
I apologize that my desires are so unfeasible however it helps noone to leave them unstated and who knows, I may inspire a more feasible idea down the road when someone reads my post.
A second apology for my improper use of parenthesis. I tend to use them to separate a secondary thought from a primary one.