I just watched the preview episodes today and they were awesome . Also, I heard from some sources that Serena does in fact have a crush on Ash. This pairing is definitely starting to become one of my faves . I hope to see some major hints of this pairing in the XY series.
Oh i do agree i have also come across some rumours (as its not official) that she does like ash and if she does thats awesome and if not I really dont mind I first started to mess around with the ship when i saw the character designs for the game but when i saw that she was in the anime then she knows of ash from when he was little i was so shocked and very happily surprised I just want to see ash squirm all uncomfortably because of hormones XD hahahaha it would be funny