I know you're talking about widebodies more generally, but specific to the A380, the only real game in town has been Emirates. Them moving over to T2 also means having their lounge in place, along with any other requirements they have. That wasn't planned as part of the first phase (presumably with the agreement of EK) and therefore it wouldn't have made sense to have such provision on Pier 1. I suspect that EK, and the likes of EY and QR, would have a preference to not operate out of Pier 1 anyway, given the walking distance - the planned Pier 3 being much closer to the main body of the terminal.