The judge will not have made an order for residence necessarily (unless it is in the Interim Order) as the court has no evidence before it yet - that's the job of CAFCASS
CAFCASS will make a report for the court on the issues the court has asked in the Interim Order (what does the IO actually say?).
CAFCASS will take ages to get anything done - you're usually looking at 16 weeks (when is your next hearing listed for at court?). CAFCASS will come around to both your homes when the child is there and do an observation, maybe ask the child some questions (and they will probably be leading questions), have a chat with you about the child's homes and your relationship with the ex. Basically CAFCASS are social services in disguise.
Then you will get the CAFCASS report - or your solicitor will if you have one. The CAFCASS report will be set out in terms of the infamous child welfare checklist as worded in the Children Act 1989.
If the current status quo is a week on a week off, then it is likely that is what will remain. If that is what you both feel is best for the child then you can both agree before court that is what you want and get a Shared Residence Order by consent (I have a SRO).
A SRO means that both parents are legally equal, the child has two homes of equal value and a SRO removes the notion that one parent is somehow good and the other isn't - as with a 'traditional' sole residence order in favour of one parent and a contact order for the other.
You can also get the terms of the order defined - I would recommend this, so that the school holidays, say, are clearly defined, what is going to be the division of half term, summer holidays, xmas and new year. It's better to get as much detail in the order as possible as you don't really want to be going back to court in a year or so's time for a variation of the order - with all the stress and cost involved.
A SRO can actually reduce conflict and contrary to what the 'experts' may tell you, parental co-operation is NOT a prerequisite for a SRO.
I speak from experience having gone through the family court system last year, had the CAFCASS report, self-represented myself and got a SRO for my daughter, despite all the crap and lies my ex told about me, my daughters father.