There doesn't seem to be much point in NG/EADS bidding on the RFP as it stands, it's clearly been written to nullify any advantage the KC30/45 demonstrated in the first competition. As NG/EADS are at a disadvantage in not knowing the pricing structure from Boeing, while Boeing has their previous bid details, they would have to submit a ridiculously low price to have any chance. Boeing OTOH can easily calculate any reasonable bid from NG/EADS and simply need to undercut them to to avoid the necessity of actually looking at relative merits.
Their best option is to announce their intention early, leaving the way open for Boeing to submit any price they want and with practically any variant of the 767. As the required standards are equivalent to the KC-135 they wouldn't even have to develop a new variant as they proposed last time, simply dust off the JASF/Italian versions, slap on the price tickets, and laugh all the way to the bank.
The only winners in this are Boeing and their shareholders.