Yeah, the WDTBRT book is the key to figuring out what the new light, if any will be.
To my recollection it is mostly a watered down knowledge book with all the controversial stuff relegated to appendix. An early, notable absent teaching was the "Faithful Discreet Slave" doctrine. I doubt they are getting rid of that. That is THE fundamental tenet of the jw faith. It is just so easily refuted. I think they are just keeping that one back until they got their hooks into you and you are studying the worship book.
I believe 1914 is mentioned in WDTBRT, however less emphasized. The chronlogy crap is in an appendix I believe. So no, I don't think it is 1914 that is getting the boot.
Is it possible that rather than jettisoning an old teaching, they might be creating a new one? Maybe a new endtime date? I doubt that since there is just to much of a free flow of info.
Is it possible they are making the changes much more slowly, since there is so much info available. Maybe it is a teaching that indirectly supports 1914 or is supported by 1914. At some point 1914 has to get dumped since it is getting to be a pretty outdated teaching. We are almost 100 years into CHrist's reign and still no big A.
CYP