Can there be any doubt as to how the Eastern bishops at such a council would vote regarding Vatican 1 & 2?
And no doubt some western bishops too! But in any case, in a united Church we should not look at how any particular block votes but at the consensus of the Church as a whole. We either trust in the Holy Spirit or we don't. But as I have said earlier, I do not think now is a time for such a council. Best to postpone it until after some time in which we again start thinking of ourselves as one united Church. It took centuries for the teaching of the Church to be developed and proclaim at the councils, we should have a little patience here.