Hasbro said in a press release. Dotm's down fall was doing the same character toys over & over again in the movie verse. Building on that,Is the answer replace all the robots or keep a few stars. What characters & designs would you like to see in TF4. Is their a need for at the very least. For the core starring transformers characters. like Optimus,Megatron,Bumblebee & Starscream in TF4. If yes,what challenges does Hasbro & Takara face in giving them all unique toy designs that parents & kids will buy their toys again in the movie verse toy line. TF4 Bumblebee might be a easy one if Volkwagon allows hasbro to use the 2014 new model in yellow. doing a G-1 Bumblebee robot mode might be different enough to make parents buy the toy. Megatron is a easy one,he could get upgraded into galvatron. with two unique forms. Megatron thru the years in more flexable in alt modes & body design than optimus. Starscream isn't needed if megatron becomes galvatron. due to galvatron's top guys being cyclonus & scourge. If Megatron is in TF4. Maybe Stascream can use his old F-15 alt mode or his machine wars huge black jet mode. Optimus Prime would be extremely hard to create a new design for. too similar then parents won't buy it. Sentinel took the big fire engine design in DOTM. Optimus would look weird & not get accepted by fans as a tank or jet. going back to the 1984 truck design would be a step backwards & would look too similar to his movie truck alt mode. Optimus might be able to get a mechsnical beast mode but then he'd lose his really great blend in disguise alt mode. a leader needs to blend in better than others especially if he's a good guy that doesn't want to harm the humans. If their looking for all newer Transformers characters & different designs. Then I say go the futeristic & mechanical animals route. Doing futeristic alt modes could look like season 3 & 4 from 1986 & 1987. The futeristic robots designs could look more like the 1986 season 3 designs. maybe more like WFC & FOC Cybertronian designs. I don't think anyone wants to see the TF4 robots designs looking like gundam or macross valkyre designs. Transformers 4 could take place 25 to 100 years into the future on earth. All the old remaining not dead cast of robots cast could have moved on & got different missions elsewhere in the universe. TF4 could be a time warp series. where the future transformers time travel to the past to change & restore history. the decepticons time travel from the future to the past to change history. the future autobots pursue to keep history the same or restore it. TF4 futeristic cast for the Autobots. Rodimus Prime,Metroplex,Five Dinobots,Sklynx,Springer,Broadside. Ultra Magnus,Kup. Technobots,Double dealer more loyal to the Autobots. TF4 Futeristic decepticons,Galvatron,Cyclonus,Scourge. Predaking,Trypticon,Blitzwing,Astrotrain,horrorcons apeface & snapdragon. Abonimus,maybe a few mega pretenders like Thunderwing.