The explosion...mebbe they nuked the island...or the actual blast when the SDF-1 crashed.
That's Roy kissing Aries. The 2-timing bugger....he would've already had a relationship with Claudia by now eh?
1st.- The ASS-1 crash landing on earth was already shown in Ep1 , and it would´ve passed at least 9 years since that event by the time of M0 so I don´t know why should they show it once again. And it´s clear from the trailer that that explosion happens on Mayan , I actually think the epicentre is on the cross marked stone that´s shown on earlier Eps.
2nd.- Roy already met Claudia before M0 but they didn´t stablish any kind of relationship , it wasn´t until they met again on SW1 that they fell in love with each other. That´s already explained on the TV series.
I won't say anything about the explosion bit.....it could be just a nostalgic explosion thingy of the ASS-1 crash.....it could be Mayan...we'll see.
In the TV series, after Roy's death, she has a chat with Misa in a coffee shop and explained to Misa her relationship with Roy. Roy and Claudia have pretty much been goin out alot on dates and stuff before being even being stationed together on the SDF-1. Roy later left to be stationed there, but Claudia was incidentally stationed on the SDF-1 shortly after and she starts saying "maybe that is fate" and blablabla. The way I understand it, they had a relationship long before SW1. Remember all those dates in the snowy streets?
What I don't rememeber is, when does Roy run off to be part of Hikaru's air acrobatic squad. Was it before or after the unification wars/ASS-1 crash?