Note: You got two downvotes, but they weren't from me.
No, this won't happen.
Sona already got a rework last year. It was a VU, but not huge.
The update was of the lowest tier of VUs, because she didn't need a Maokai update.
Even then, Maokai didn't get a recall animation either. It's completely unnecessary.
How I see it, the only way she would get a recall animation, is if she gets a Garen-like update; where they completely tear down everything and start from scratch. Maokai's isn't the same because it's using his old rig but also adding on to that, which is why he doesn't have a recall.
Recalls can not be added to just one skin, either. When a champion gets a recall after a VU, then they all do...
On a personal note, I don't think Udyr or Sona will get a big VU for a long time, since their Ultimate Skins kind of represent just that.
If you update a champion that is just as good as those skins then what is the point of the skins?
I feel that if they ever did update Sona to look amazing (like DJ but w/o the DJ part) I bet people would pick up the DJ because of the music affect, nothing more.
The Arcade skin would probably get a recall and would be just as good. :/
If you think I'm wrong, please tell me why. That's just my two sense.