While many may have different preferences for Batman, be you from the old school of the golden/silver/bronze age comics, Adam West's TV series, the 1990s films, Christopher Nolan's Dark Knight trilogy, or the most recent "Batfleck" generation, this film has enough references to make any fan of the Caped Crusader grin from ear to ear for the duration! The constant comedic tone is a refreshing take on the normal DC brooding character of recent years, and fits the LEGO film brand well. Similarly, the other pop culture references are numerous, well played, and an utter delight to Sci-Fi, comic, and gaming nerds alike.
The blu-ray transfer, coming from a digital source, is just about perfect visually, with a well matched multichannel audio track (Either DTS-HD Master or Dolby Atmos, though the Atmos track really didn't seem necessary to me for this film). The HDR was a fine addition, but like the Atmos audio, really not a very noticeable contributor for me, even on a great LG OLED panel and an Onkyo Atmos-capable system.
The extras include a handful of deleted scenes, a few animated shorts, and a variety of featurettes, all of which my family found enjoyable. The shorts were definitely the hit, though.
All in all, a great buy, particularly on sale. 4K UHD/HDR are not really a must for this type of production, so if there's a large price difference, I would stick with the standard blu-ray - You'll still get premium audio, and picture quality that beats out most 4K streaming options. Great blu-ray, and a fun family film that we will enjoy over and over, for years to come.