I get what you're saying, but I still have the age problem. I just don't agree with the idea of ten-year-olds dating. If they allowed time to move foreward and they let them actually be 14 or older then I'd definitely say that the show could go on with their relationship in the background in the manner you've suggested. I think it's iffy as things are.
Then again, I have very strongly held views that you shouldn't rush out of childhood. Ten is a good age, teenagerdom not so much. I hate to see younger people cutting their childhood's short. That's part of the reason I wouldn't be interested in them dating so early. I realize that this is a personal view that not everyone is as bogged down by age.
To answer my own question...
What would you imagine as a Pokeshipping moment for the final ending theme when Pokemon does end (however far down the line that may be)?
I wouldn't say no to a time skip with a strong suggestion of them being in a relationship. But really, all I'd need, would be a shot of the two standing together, holding hands, looking at each other and then glancing determinedly into the future. Especially if it came after shots of the other girls doing things independently or within the other groups they've established through the series.
And that, I think, is an image that could happen at any age.