SYRIA UPDATE: The Kurds have completely expelled ISIS from the city of Manbij. In this slightly outdated map, the Syrian Kurds are light yellow:
https://upload.wikimedia.org/wikipedia/commons/1/11/Syrian%2C_Iraqi%2C_a...
As you can see, their territory is split into two main areas (plus a small third area in Aleppo city). Now that Manbij has been captured, there are only two major battles that need to be waged before the Kurds can finally connect their territories: The battle for al-Bab, and the battle for the North Aleppo plain. Earlier today, the Kurds announced the beginning of preparations for the offensive against al-Bab.
Doing this, however, would leave the Kurdish lines stretched relatively thin, and would leave a well-supplied pocket of ISIS forces to the north of Manbij, operating out of Jarabulus. It's likely that the Kurds will charge toward al-Bab in order to prevent the regime from taking it and cutting off the clearest path for Kurdish unification, but the regime currently has its own problems in Aleppo, and doesn't really have the resources to spend cockblocking the Kurds. It's not inconceivable that the Kurds may feint toward al-Bab and then pivot away to attack Jarabulus. We could even see a feint toward al-Bab, a pivot to Jarabulus, and then an assault from Afrin on the North Aleppo countryside, closing in on al-Bab from the east. The strategic value of all this tomfoolery may be limited, though, since we're dealing with a fairly small area.
In Aleppo, the southern supply route that the rebels established last week is still going strong. A rebel offensive is ongoing to expand the supply route and make it a little more secure, and other offensives have been taking place in other areas, presumably to keep the pressure off the supply line. SRO reports that massive rebel reinforcements have arrived from Idlib for a concentrated assault on Aleppo city. Islamic clerics have decreed that looting of the city is impermissible and that the city's Christian population is to be respected.
In Iraq, there have been further rumblings of an upcoming offensive, which will probably involve bringing the front lines right up to the outskirts of Mosul. Most of the towns south of Mosul are still controlled by ISIS, but the Iraqi military does control both Qiyyarah airbase (north of Shirqat on the map) and the highway connecting it to the rest of the government's territory. That same highway continues on to Mosul without encountering any major towns, so they might just drive down the highway until they get to the hills and defensive positions at the outskirts of the city.
The Iraqi Kurds also conducted an offensive in the direction of Mosul, capturing a number of Assyrian and Shabaki villages. The area around Mosul is a kaleidoscope of different microscopic ethno-religious groups, and I sincerely doubt that the Kurds themselves can make sense of it. They're probably taking the position that all non-Arabs in Ninevah province are basically Kurds and should be under Kurdish control. It's difficult to say how well that bodes for the actual Shabaki people (who are apparently cousins of the Zaza people of Turkey, and who follow a religion that's kind of like the Yazidi faith but more in line with Shia Islam). I don't think that the Kurds have any designs on Mosul itself, but they may try to pick up a few of its suburbs. Large parts of eastern Mosul are historically Kurdish, but the political problems posed by dividing the city would be severe.
