what do you mean, "new format key from future". As far as i know, the private key format has always been a 256-bit number. This 256 bit number can be represented in hexadecimal format: 32 bytes = 64 characters.
Other formats, like WIF can be converted to hex (and vice versa).

In my previous post, this 64 character representation (HEX format) was one of the possible options.

Sorry dude, i'm going to stop following this thread... I feel we're getting nowhere.

Good luck tough!