Thanks to @preterniadotcom on Twitter for pointing this out! The HasCon 2017 exclusives, including Titans Return Arcee and Transforming Power Bank Optimus Prime, have all been added to HasbroToyShop with a sale date of September 20th. So those of us who didn't have a hookup at HasCon still have a shot! Keep reading for links to both figures.
Titans Return Arcee, a remold of Blurr, finally gives us the Headmaster Arcee figure that certain notable fans have been requesting for upwards of 20 years. Her Titan Master Leinad... well, the name is pretty self-explanatory if you reverse it. Also included is Titan Master Ultra Magnus, the diecast-bodied Titan Master of Ultimate Intelligence that (like Arcee herself) was likely once intended for a Velocitron/Cybertron-style boxset. Her SRP is $25.
Transforming Power Bank Optimus Prime is... a USB power bank! That transforms into Optimus Prime! But no, a working power bank Transformer is pretty cool. Plus, he has a light-up sword that plugs into the power bank, making him the first new mold with "Laser Rod" functionality in twenty-some years. (Well, maybe fifteen: the Micron Densetsu version of Armada Hot Shot had a light up fist for the clear-plastic Star Saber.)