...this stuff isn't even spoilery so long as I edit out one name. XD; *does so*
I suppose that's true, but if they re-use the "touch this portal in order to be transported to the fight" sort of thing, it makes it harder to make it seem canon whether it's intended to later on or not. :s In FM, you walk through a hole in the wall at Hollow Bastion and Xemnas appears to test you. It's not out of your way and it makes sense (canonically) that he'd wait for Sora to stray a bit from his main path and fight him out of the way when no one else in HB is around to see.
:( But when you go to fight LS or the secret fight in BBS (the original secret fight, not the new one), you go up and examine a gaping portal sort of thing and get transported to another area to fight it. (Actually, I don't think there's a transportation cutscene for BBS's boss, it just sort of... appears idk. I did that fight twice and gave up. XD) It's not as explained so it's hard to make the situation canon. D:
It's like how I don't consider the Absent Silhouettes in FM+ to be canon since you can't really explain them. (Even if it is hilarious to imagine Marluxia only sticking around to partially-exist next to a flower. /sigh) But the data fights in Radiant Garden at the end could be easily explained, so it's not as hard to see them as canon. u_u If there's even a slightly good way to explain it plot-wise, I'm fine with a fight. Otherwise it feels so cheap and tacked on. D:
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I'm pretty sure it was in an Ultimania interview... or some interview where Nomura mentioned that the English version was getting added features. I swear one of the interviews mentioned that they tweaked cutscenes and added a few in to make the plot less confusing.