For me, Reeves' comments at FanDome were the nail in the coffin of the second suit rumours. Reeves is treating the suit itself like a character. It already shows Batman's history (the first year) and it will go on a journey and arc like Batman himself. Reeves' description of Bruce repairing, tweaking, and upgrading the suit as he goes against a Nolan or MCU Iron Man style new suit. It suggest more to me that if there are any changes it will be minor upgrades to the existing suit that we have all seen. It will be little details that move this current suit towards a more refined version and I have a feeling that approach will continue throughout the Reeves' trilogy.