That's exactly what I am anticipating . Jealousy is the motivator that I expect will push him to make sure HE will be Kyoko's character's love interest in the drama, because he doesn't want to see her interacting intimately with anyone else, even if it's 'just' acting. Once they are both secure in their relationship, I don't see it being a problem, but now? While both are so fragile and unsure of themselve's or the other's feelings? No way do I see him being capable of being a proper senior and guiding her through the process of 'loving' another actor right now. He is going to want to be THE ONE, if it can possibly be arranged. Either way... Is or isn't... Angst is guarenteed!
Hmmm... That's even potentially feasible, although if that were the case, I think it would have already been mentioned... Ren doesn't seem to be the sort to leave things to chance. If it actually IS, I am certain fireworks are going to ensue, in Ren's brain if nowhere else. I suspect that possibility would be easier for Kyoko to deal with too... at least on the set. Off... and interacting with Ren... Oh, gosh, that's a frightening prospect. LOL.
Murasame would be another interesting prospect. I suspect once he saw Ren (if not immediately, then in the first fight scene), the identity of Actor X would be out of the bag (although I'm positive Murasame would keep the secret), and thus Setsu eventually as well, although I think that might take him a little longer to put together. It would also be interesting to see how much of Cain Heel's animosity for Murasame transfers over to Ren. There is a lot that could be done there, although I think it is less likely then Kajima. Fun to speculate though.
Hmm... Kyoko's first love role... They originally wanted Ren for the wandering samurai... His schedule no longer conflicts... Might 'Lotus' soon experience an unexpected MALE lead change as well?