By Charlotte McIntyre EastEnders fans have worked out Karen Taylor will be killed off in a dark murder twist. BBC soap lovers have predicted Karen, played by Lorraine Stanley, won’t last much longer in Walford after returning to demand answers about her son Keanu Taylor’s disappearance. EastEnders will know The Six – Stacey Slater, Denise Fox, Suki Panesar, Linda Carter, Sharon Watts and Kathy Beale – covered up Keanu’s death and buried his body in Kathy’s abandoned café after Linda stabbed in to stop him from strangling Sharon. The Six, so far, have convinced Walford that Keanu went on the ru…