Shocker has a good reason to be the main villains this time, with the Rider 3 plot, so it's not going to feel like another "job".
Anyways, onto the good news: They did what I hoped they would do, and the bar raised in Kamen Rider Taisen is not ignored. Furthermore, they are bringing back second Riders too, who deserve as much spotlight as the main ones (and many of them should already be in the main line-up IMO).
Tachibana Sakuya is back. I bold that name because I'm hoping some connection or allusion is made to Tachibana Tobei's Racing Club, which is the logo Sango has in the TriCyclone. The discrepancy between the Shocker logo being on Sango's belt and the TRC logo being on the vehicle is what makes me believe there might be some form of a Tachibana Racing Club or at least a mention to them, which makes me bring up this point with Garren.
Whatever the case, it's a thrill to have Zeronos, BLACK/RX & Garren back, and I sincerely hope we have a Fujioka, Sasaki and/or Miyauchi in there too (and who knows who else!).