Sooner or later, either in the next immediate iteration or the one after that, the Type 055B will be part of the new huge wave of build-up as indicated by POP3, part of the expenditures of the Fourteenth Plan. Just wait patiently and sit back relaxedly
What could be the features? EMRG, IEP, more UVLS, and many more improvements over the existing many-year-designs of the early second decade, or even more likely within the first decade of this century. The time-lapse necessitates lots of improvements to do.
Note: with assumption about the nomenclature, that 055A is already being used (for most of the time I just see 055 without letter). By 055B I mean one variant after the current one.