No, I don’t want this to happen. The two Orc factions fit together because they have some areas of common colour scheme (GREEN), worship the same god (Gorkamorka) and have a common goal (smash stuff up). Fyreslayers and Kharadron on the other hand have very little in common other than being Dwarfs. Fyreslayers eschew Armour, Kharadron cover themselves in it from head to toe. The Fyreslayers revere Grimnir to the level of being warrior-monks, while the Kharadron have largely ditched the Ancestor Gods for science and when they do let their religion into their lives they worship Grungni. The Fyreslayers collect gold to resurrect Grimnir, the Kharadron collect gold to simply get rich. The two factions just wouldn’t fit together in a combined faction very well at all.
However, due to their shared heritage they can become allies, and this is enough in my opinion. If the Elves can have separate factions, the Dwarfs should too!