I had seen these being tweeted during the SDCC period but had unfortunately no idea what or whom exactly they were from - until now (at least for me anyways). Both figures are from the Mazinger Z SB36 PROJECT by Japanese toy brand Secret Base!
There were predominately two character figures: the 3.75" tall MAZINGER Z, and 4" tall ROKURON Q9 - in a variety of colorways (shown below have since been listed "Sold Out" at SB themselves). Currently Toy Tokyo is lists two versions on sale at US$74.99 each, coming in bagged-n-tagged. Would LOVE to have them, but could hardly afford them LOL