Nothing. I asked this a while ago here and got no replies; Anabolics are just not evolving, and that is almost certainly due to the laws in most countries (especially USA) prohibiting their manufacturing, sale, possession or usage. While Joe Scientist on Reddit can order raws, beakers, syringes, hot plates, vials and GSO to make his own batch of Test at home to use or sell he is unfortunately not able to get his hands on actual lab equipment which could allow for legitimate scientific experimentation and research to be done in the sense of modifying the base compounds to derive new ones or however the fuck it should be worded.
The day that we see legalization of gear and the removal of WADA/USADA type governing bodies from professional sports we will see absolute freaks popping up within a decade guaranteed. Once there's money in it, someone will figure it all out.