If it does happen then it will be another year or two before it arrives :!: :!:
Here's my views:
UK DC5:
1) Would have revised suspension for a start
2) Redesign of front bumper, no way would the point pass predestine safety
3) New exhaust system to meet European targets
4) ECU to allow running on standard UK fuel
5) Because of 3&4, would have less power
6) Whole car would require crash testing
Now onto cost, this depends on the spec level required here in the UK. If similar down rated spec as the CTR compared against the JDM, then in my opinion you are looking at £19K ish
If released with full JDM spec, then I think you would not see much change out of £21K ish (remembering that the DC2 was launched at £22K).
I base my estimates because of the cost of points 1 to 6. People on other car forums who say full JDM spec £18K are having laugh.
Mike