Vanilla is a product of Lussumo:
Documentation and Support.
It's great that guys like Warren are showing up to make a buck on these titles, and I highly respect that he's using it as a marketing vehicle for his creator owned work, because at the end of the day these characters were around since we were born, and they'll keep going long after we're dead.
I recall enjoying his Stormwatch cop procedural
Darick and I own TRANSMET and all that is included in that. If the terms of the contract were met (and don't ask me what they are because I don't recall), certainly we could do new TRANSMET stories elsewhere.
Are - for example - there examples where a writer is hired to write a certain existing book, but retains right to new IP created in that book (new characters etc)