Before I get started I just want to say that this is all completely speculation right now. I admit that I have a horrible soft spot for this pairing (I seem to be the only one in the world that does), and that may color some of this idea, as well. We know that both Rodimus and Arcee will be in the next season, and I wonder of the writers are planning on giving them one more go as a couple. Yeah there's the whole age thing (she was in the great wars 4 million cycles or so ago, we don't know enough about him yet to make any judgement), though to be fair, i've always been somewhat confused on the nature of cybertronian aging (Ultra Magnus appeared rather old in the flashback form Thrill of the hunt, and for all we know Ratchet was already not a young bot anymore then, as he was already one of the best repairbots on cybertron, I won't get started on UM). Plus, there's the whole Lockdown situation. I know that Arcee lost her memories in an incident with him and Ratchet, and could, conceivably know about Lockdown's hand in the whole thing. I've been told (though my knowledge of the UK comics is limited) that Rodimus has some history with another weird headed bounty Hunter, Death's head. All this could Conceivably lead to a sort of storyline for the two (to go along with there already established connection). Like I said, this is all speculation, but I admit that I wouldn't mind seeing this pairing get one more shot (I'm already hoping to finally see Roddy do what i've always wanted him to do, grow up and accept his destiny as a leader, so who knows?).