Well, last year in Canada, maple flavoured chocolate bars were the trend. Maple Coffee Crisp, Maple Oh Henry!, and Maple Caramilk were introduced (though I think that Maple Caramilk may be a permanent addition to the Cadbury family).
This year, yogourt's the in thing. Two weeks ago I had the pleasure of trying Coffee Crisp Yogourt, and today I bought myself an Aero Vanilla Yogourt. I haven't tried it yet, but looking at the little cardboard display in the store, it would appear that it's your basic Aero bar, with a layer of creamy yogourt filling on top of the chocolate bubbles, whereas I was expecting something along the lines of the white Aero, which has the white bubbles enveloped in chocolate. I don't know if this is exclusive to Canada, though.
