Vision OTS refit- What will chage?

[ShipsInBergen]

I saw a post a few weeks ago suggesting Vision of the seas will be having a refit later this year (and there is a gap in her schedule on the RCCL website).

 

Does anyone know what is likely to change based on previous vision class refits? I know it won't be anything like the lenghthening of Enchantment but are they likely to add new features like speciality restaurants, or will they just generally bring the existing facilities up to date? I'm sailing on her next april and would be interested to know what to expect.