from simracingworld:
"According to reliable sources, it seems as if there could be no more EA F1-Games in the near future (F1 2002, F1 2003 etc), at least not developed by ISI (Image Space Inc) anyway. Sources state that ISI are "sick of Formula One games", and wish to concentrate on a new Nascar sim instead.
EA refuse to comment on titles that haven't yet been announced, so there is no way of verifying these rumours just yet. Stay tuned for more."
If it's true then there will be no real competition between the 2 rivals and this could affect GP5 too.