In light these aspects, the famed "Mad Love" romance angle could be a potential source for the comedic aspects of Joker's persona. This is especially true when considering Harley's habitual over-attachment, which (at least, on Batman: The Animated Series,) was rarely reciprocated with the same vigor, creating regularly awkward moments between the couple. It seems that with Harley, this Joker is also extremely meticulous, which may even be a channel through which his unique form of villain dementia will manifest.
We have heard Suicide Squad director, David Ayer recently refer to Leto’s rendition of the role as "majestic." Perhaps, that adjective was far more potent than most folks may have anticipated. It could be the case that this version of the Clown Prince of Crime may end up emphasizing the "Prince" part of that common moniker. I suppose we’ll only know for sure when Suicide Squad hits theaters with "comedic" zest on August 5, 2016.