Bandit,
Tell them you will take the 787 or NOTHING!!!!!
Joking... Seriously, with your A310 time and likely international experience, you could get a place on the 787 depending on your timing as they are adding 5-6 this year. But I assume many of those slots will be taken - I would guess you would be offered the A330 or 777 given your widebody experience if you are indeed hired. Both would be great too!
Good luck in your process!