Nothing gets rotated out until after the World Championship.
They don't reveal what is being rotated out until after that, so not until then at least.
Regarding Items - Energy Retrieval in B&W is an "Item." Energy Retrieval in Base/LC was a "Trainer."
Is Energy Retrieval like Bill (originally Trainer, reprinted as Supporter)? Requires a reference?
All old Trainers are to be treated as Trainer-Items when interacting with new cards that know the difference.
It's similar to how we handled the changes in DP.
However, much more important is the text change to Energy Retrieval.
Because of THAT change you would need a reference.
Why doesn't Base PlusPower need a reference?
Will Professor Oak from Base become an acceptable reprint?