Alleged screenshots for Music and TV apps in macOS 10.15 surface
A set of new screenshots have emerged, with sources familiar with the matter claiming that they are part of new apps for macOS, in what may herald a breaking up of iTunes into discrete apps.

The screenshots have a resemblance to iTunes, as was previously predicted. The screenshots feature the familiar side bar, and media player. However, one set of shots is clearly for an app with video separate from music.
The shots also see the return of color to the sidebar, with gradients and the like.

The screenshots were supplied to 9to5 Mac. AppleInsider cannot vouch for their authenticity.
On Tuesday, new screenshots claimed to show a new "Dark Mode" in iOS 13. A new Reminders app for the iPad was also allegedly exposed.
Apple is expected to debut iOS 13, macOS 10.15, watchOS 6, and tvOS at next week's Worldwide Developers Conference in San Jose, California. Other iOS 13 upgrades should include new health features, and updates to Screen Time, iMessage, and Apple Books.

The screenshots have a resemblance to iTunes, as was previously predicted. The screenshots feature the familiar side bar, and media player. However, one set of shots is clearly for an app with video separate from music.
The shots also see the return of color to the sidebar, with gradients and the like.

The screenshots were supplied to 9to5 Mac. AppleInsider cannot vouch for their authenticity.
On Tuesday, new screenshots claimed to show a new "Dark Mode" in iOS 13. A new Reminders app for the iPad was also allegedly exposed.
Apple is expected to debut iOS 13, macOS 10.15, watchOS 6, and tvOS at next week's Worldwide Developers Conference in San Jose, California. Other iOS 13 upgrades should include new health features, and updates to Screen Time, iMessage, and Apple Books.

Comments
If they have finally separated Podcasts, TV and Movies out it will be a good thing. What would be better is if Apple has improved the way Apple handles metadata. Ask anyone with a large local library of non-iTunes store media.
First, the title bar, which normally extends completely horizontally, stops at the sidebar in the purported Music app screenshot while it continues in the normal fashion for the purported TV app. More revealingly, there are navigation buttons on the top of the sidebar in the Music app. That simply doesn't make sense from a UX standpoint and Apple is not exactly known for sloppily throwing things together (in fact, Apple has a reputation for quite the opposite).
Second, the search bars are in completely different locations, and they both appear as native AppKit search bars, not the UI search bars that we've seen in the Marzipan apps so far. If they were both in the same location I would be tempted to dismiss this as improvements to Marzipan, however these two suspicious facts about the search bar placement alone seem very... concerning.
Third, certain aspects of the sidebars look like typical macOS sidebars (such as section titling) while others look like Marzipan sidebars. Maybe some massive improvements to Marzipan have been made, but a lack of details in the TV app's "genre" section seem rather odd. Why do only four genres appear? Has the person who posted these mysterious "screenshots" been downloading movies/TV shows in these four categories alone? And if they have, wouldn't they retract those details as well? Something is off here as well.
Fourth, those music controls look suspiciously like they were lifted off of iTunes and airbrushed in a little bit. The entire interface there distinctly clashes with the overall interface of the apps. And the left and right parts of the interface are distinctly different.
And fifth, why retract when the content could have been set to its default state? That could be a sign of authenticity or a lack thereof. This last point is the least conclusive.
In conclusion, though, this seems to almost certainly be a series of false screenshots (and I have a feeling the related iOS screenshots are also fake, although they were posted in a separate 9to5Mac article). We'll see next Monday.