Conker is Seavor, without him there's no need to even begin to entertain the idea of making a sequel or anything.
Proof of that is that they actually contacted him to do the voicework because even at MSFT they know that without Seavor Conker is nothing that interesting to begin with.
Better ask for a Banjo sequel or something else entirely, Conker without Seavor is pretty much not Conker.
I'm not speaking about the VA here but the script really and everything about it.
I think Chris is in a state where he wouldn't say "no, never!" anymore.
The script for a Conker is even ready if I remember correctly.
Wouldn't it be a great irony? Conker: Another Bad Fur Day - developed by Dakota Studios with Chris helping Holy shit, this would bomb.