I also spoke to my Imperia relationship Manager who I find quite transparent. He has confirmed that the revised salary criteria for Infinia, DCB etc. has been communicated to all concerned within the bank in a briefing. Also, upon checking on "Infinia Reserve" he said he never heard of it and to the best of his knowledge, Infinia to remain the top card. Banks tend to reserve & copyright certain names that could be used in future based on their business strategies.
I also cross-checked with the Cards SM whose response was also on the similar lines.
I personally don't think that Reserve or whatever is getting launched any time soon or it will be launched at all.