To me s4 will be done, probably ea is working on other games so I think we will see something in 2018.
That game will probably sell more than 5 millions copies and it's a number that ea for sure think about
Than we have a big name of skate business like the berrics which putted himself in the middle giving to the gamers a "voice", ea knows it and it cannot do like nothing.
Than I think that s4 was already in their mind so hopefully our dreams will come true.
The game it's almost perfect to me it needs just few improvements (like flick it than catch it, now if u flick a trick, u already know it's landed.) And few details ( more sponsorship stuff l, breakble decks or just more use of the money).
Of course a new sick city, im not an expert but to me it shouldn't be a too much expensive job or too long job either. Let's see what will happens .

Sorry for bad english