Battlefield 3 expansion Back to Karkand, featuring remastered maps from Battlefield 2, isn't the first time DICE revisited one of its games, and it appears it won't be the last. One eagle-eyed gamer spotted an easter egg that indicates DICE intends to make like Doc Brown and go back to the future with 2143.
DICE is fond of teasing future projects with easter eggs, most notably teasing Battlefield 2142 in the Battlefield 2 Euro Forces and Armored Fury map packs. Speculation is that 2143 will be the next entry in the Battlefield franchise and a direct sequel to 2142.
However, it's worth noting DICE's recent trend of going back to its previous games and remastering maps. Digital game Battlefield 1943 was based on the original Battlefield 1942, Battlefield: Bad Company 2 expansion Vietnam is based on the second game in the franchise, Battlefield Vietnam, and Battlefield 3: Back to Karkand is based on Battlefield 2 maps. So 2143 could very well be the next expansion for BF3 based on the 2142 standalone game.