I agree, 3rd is the best picture, I love it!
That said, the real reason why I wanted to post is that I thought about something concerning KibaLG8's post about the first info for the black and white anime(don't worry I will make a link with pearlshipping at the end). in the article, they talk about a new heroine. When I saw this, I told myself "who is pokemon's current hero/heroine?" and the answer was obviously ASH! That said, I think by talking about a new heroine, they could be saying that Ash is the one to leave. Then obviously that would also mean that they are going to start anew with black and white.
That said I think this would be the best thing for us because it would allow pearlshipping to get a HUGE finale( a hug or a blush would be really nice) at the end of the league as it wouldn't affect the serie.
to answer the question about what is going to happen in the league, I would answer it like this:
if Ash is going to come back in b&w, i dont expect anything big, only cheering and usual stuff or some onesided stuff on dawn's part. i mean they can't have anything that would change ash's personality as it would affect the whole serie.
but if my theory is true, then, as I said before, I expect this shipping to become canon! It wouldn't matter at all as the b&w serie wouldn't be affected.
If that happens, I might continue watching the serie, but if Dawn leaves and nothing happens, if probably gonna abandon this anime. I mean, this "ashy shipping cannot become canon" thing is really getting old...