According to the leak’s source, the A77 will ship with a magnesium alloy body, sporting a new 24-megapixel sensor, a new double Bionz processor, and a 3 million dot OLED viewfinder to boot. You will also be able to enjoy an improved autofocus with 11 cross autofocus points, where it can shoot over 10 fps or full HD video. As for storage, the A77 will play nice with CompactFlash, SD, and Memory Stick cards.
As for the Alpha A65, this will be an upgrade to the A55. According to the person who leaked such information, the A65 is not too far away from the A77 itself, save for the lack of a top LCD viewfinder or the magnesium alloy body.