Teen Titan Karen Beecher started her career off as part of a bluff on the team she'd later join. In order to make her boyfriend Herald look good in front of the group he'd just become a part of himself, Beecher built herself a bumblebee-themed outfit and attack the Titans, with Herald easily defeating her and letting her run off into the night.
Since then she got herself tooled up with some robotic wings and got shrunk down to the size of...well, not an actual bumblebee, but pretty small.
Totally a rip-off of: Wasp
Janet Van Dyne has been at the foundation of the Avengers since the early days, even if she's best remembered for her "tumultuous" (to put it mildly) relationship with ex-husband Hank Pym. As the Wasp Janet has the ability to shrink down to...well, not the size of a wasp, but pretty small, and grows a set of wings when she does thanks to some genetic tampering.
Look, Bumblebee is basically the same character as Wasp. Her codename is a riff on the same thing, their powers are almost identical, and they didn't even bother giving Beecher a distinct costume to differentiate her. Pretty lazy, DC.