For this shelf, I'm going to add Studio Series 1986 Springer to the space behind Blurr. I also want to add one more Voyager or Leader Autobot to this shelf, but I don't know which one to go for yet. I used to have Kingdom Rodimus Prime here, but I don't really like that figure much so I'll most likely sell it.
I've pre-ordered the Takara Beast Wars Again Tigatron and Blackarachnia twin-pack, and I'll add the Tigatron from that set to this shelf. I may also pre-order the Dinobot and Tarantulas set, along with Legacy Silverbolt. I'm also hoping we get a new Depth Charge at some point, but we'll see.
I plan on adding Legacy Vector Prime and Side Burn to this shelf, and swap out Hot Shot for the Powerlinx version. Legacy Animated Optimus and Bumblebee may also go here, but I'll have to see what they actually look like before I commit to buying either of them. I feel as if I should also make space in case Robots in Disguise 2001 Prowl and X-Brawn happen in the future.
I've pre-ordered Studio Series Rise of the Beasts Mirage, which will go in the space to the left of Optimus and Bumblebee, but other than that, I don't know what more to add to this. Evan from Hasbro's Transformers brand team recently said in a Q&A that he would like to do a Voyager version of Bayverse Ratchet one day, so I feel as if I should leave some room on this shelf in case that ever happens.