...Would they drop the Bat-Embargo for this? I'm guessing not, since this would be considered continuation of the canon...
Chloe told Clark (after she disappeared for a while, thanks to Checkmate) that she'd encountered a rich guy with all sorts of gadgets and a "wonderous woman" who'd give Clark a run for his money.
Obviously, she'd met Bruce and Diana. DC's longtime trio does exist in the SMALLVILLE universe.