much to my disappointment, there is still no news or update on the Toxic Wasteling that was datamined from the PTR. judging from the datamined abilities, it sounded as if it was going to be a Disgusting Oozeling doped up on drugs. how awesome would that be? the oozeling and wasteling could even go on play dates together.
with so little news on this potentially new pet, and considering how far the along testing is on the PTR, it's likely that the wasteling won't make it to live servers this time around. (or blizzard's being sneaky, those sly devs.)
it's hard to say for sure, though. there have been many PTR companions that never went live. some even already had a vendor, a vendor price, an icon, a summon spell, etc, but it just wasn't meant to be. some examples are the Baby Shark and the XS-001 Constructor Bot. both wonderful ideas for vanity pets, imo, yet they never reached live servers for one reason or another. i guess even GMs need something unique to parade around with while they do their in-game duties? ;)
so i'm still hoping and waiting, but i don't think i'll hold my breath. in the long run, maybe it's better that one doesn't make the cut. i have my plate pretty full already, and yenno what they say about your eyes being bigger than your stomach, yea? heh.