I think they will stick with the current design, wouldn't make sense to start from scratch again, especially time wise, i.e applying for planning permission etc.
Plus I think new investors will need to take on board the planning restrictions upon us due to building in the park, obviously all those exotic, weird and wonderful designs from China are a non starter!
I like the HKS design, it's got a huge single tier kop and it stands out as the most unique stadium in British football, not everyone's cup of tea, but it'll do for me.