This teaser is nothing to pay attention to but its also a standard practice in the industry.
For example its better than 2K who always release a new teaser trailer for the new game with footage from the previous game.
Last year there was a teaser for Uncharted 4 that showed nothing, is that a sign of no confidence in the product?
Very few can compare to Kojima when it comes to trailers (Gran Turismo), if you want to criticise Konami thats fine but at least be constructive with your criticism. Moaning about a teaser is pointless.