I think it is vital that you consult with a lawyer now. I don't think you should wait until court at all. Two good lawyers can hopefully settle this before court.
Spousal support is a very complex issue. It is hard to predict what a court would order and in fact a couple of years ago a judge said making a spousal support order is like playing darts blindfolded.
The Court would look at the length of the relationship, the age of the spouse, the roles the spouses played during the relationship, whether the spouse worked before or during the relationship and whether the spouse is working now, the skills, education and experience of the spouse, the lifestyle during the relationship.
The Court will look at the means and needs of the spouses.
The Court will apply certain principles such as the fact that both spouses have a duty to become self-sustaining as much as possible. And the idea that no one is supposed to be financially penalized by the cohabitation or it's breakdown will be taken into account by the Court.
You are separated as your spouse has clearly decided the marriage is over and is demanding spousal support.