Also off topic a little bit, here is a little definition I found for a word I'm most of you are aware of called retcon.
Retroactive continuity (often shortened to retcon) is the deliberate changing of previously established facts in a work of serial fiction.[1] Retconning may be carried out for a variety of reasons, such as to accommodate sequels or further derivative works in the same series, to reintroduce popular characters, to make a reboot of an old series more relevant to modern audiences, or to simplify an excessively complex continuity structure.
Though Cox has stated that Lords of Shadow will not be part of the old time line he hasn't really came out and said that it wouldn't replace it either but IGA is still at Konami and obviously was credited in Castlevania The Adventure ReBirth. We also know he is working on a new project whether or not that new project is a new castlevania for the DSi or other system we do not know.
Just some food for thought course it could just be some useless information.