Well, apparently, it is a far bigger prop than I had initially anticipated, assuming the word on the street is correct, this is all to sell some merch/make some record.
If Kane is about to go out the so is Henry, Kane is only 4 years older.
Not really. Henry is at the absolute peak of his career, and has been generally been doing well for the last 3 years. He has been on fire this year. He completely reinvented himself, and has been giving the best matches of his career(he has been pretty good in the ring post-2007). I would argue that he was pretty much the super star of this year, even if only a few others noticed. There might be people who did certain things better, but as the overall package he was probably better than anyone else this year. He had the MOTY(with Danielson, IMO), had a lot of other great in ring stuff, completely shined on the mic(he usually does), and had a pretty interesting character. Furthermore, the WWE seems to be taking himself seriously, and he is in the middle of the biggest push of his life.
Compare that with Kane -- who has been a personal favourite of mine over the years -- but never a great in ring worker, has been stagnant and mistreated over the years, and generally doesn't seem to have much going for him. Sure, he got the mask back on, but that means very little. That won't rectify much and it is for some meaningless reason as it is. He is old, not exactly on a high note of his career, and basically spent. If anything, he will be leaving soon, and Henry will be sticking around for a few more years and leaving when he wants to(Henry might leave in 1-2 years or stick around). In just about every relevant factor, Henry is in a much much much better position than Kane. I like Kane, but this is merely the reality. Kane was one of those big guys who was deceptively athletic -- thus giving the illusion that he was great in the ring(since smarks really seem to fall in love with guys who move fast) but he never really panned out in the ring.
Comparing Kane and Henry at this point, really, isn't fair to either of them -- especially Kane. Henry is just in another league right now. Henry has ALL those factors going for him, AND, he has about 4 more years of youth, barring some health condition or some injury, Henry is in a much better position and point in his career than Kane is.
It made the whole character of Kane like wtf why isn't he a biker too(illgogical yes)
Not quite. Being a biker is a personal hobby, that one does out of one's own volition, it is not a genetic inclination for the most part. It wasn't as if Taker is Kane's brothers, and we find out he is a vampire -- and then we all go scratching our heads, thinking, "Shouldn't Kane be a Vampire too?". It is different. If you mean, the whole transition to being a human -- well Kane has always been portrayed to be more human than Taker -- and the age of kayfabe is over, no one actually thinks they are undead zombies anymore.
Taker went back to Taker but never really did to much with Kane after that and WWE tried to do one thing for Kane without Taker unfortunately for all involved it was the Katie Vick thing.
Kane really needs a Kane storyline without Taker involved something just completely him but true to the character. They've told us about their childhood "the fire" what happened after that bring in something or someone else that Kane hooked up with after the fire thing that could "haunt" him.
Well, Kane was never really meant to break out, for the most part he was another big monster that was created for Taker to feed off of. Kane became more over than was initially expected but the WWE never altered his role significantly. He was either always fed to Taker, or to someone else. Usually, the WWE takes him more seriously when they are trying to put him in a program with Taker. The last one was definitely booked well for Kane, until the program with Edge totally ran over the program. In any case though, Kane's problem isn't Taker at this point. Kane has never, despite the proclamations of his fans, been at the same level as Taker -- ever, save for possibly brief periods of time. So naturally he isn't as successful as Taker.
I think Taker is truly going out soon and Kane is being setup to replace him as the top dog in the yard until he retires also.
Well, firstly, Taker isn't the top dog in the yard anymore, he hasn't been for about 2-3 years realistically. As for Kane replacing him -- that is doubtful. Kane is only a few years younger, and can't ever hope to reach the pinnacle the Taker character did, and especially not at this point in his career. If anyone replaces Taker, it will be someone much younger -- not someone in the senescence of his career.