It seems so. There haven't been any new releases for a while, suggesting that they've been discontinued. Maybe it was due to various reasons like low sales or changes in the publisher's strategy.
It's hard to say for sure. Sometimes, factors like low popularity, changing market trends, or issues with the publishing contract could lead to a manga's discontinuation. For Slam Dunk, it might have been a combination of these.
In fanfics related to 'legends of chima', a story about pregnant Laval could be quite an interesting concept. Maybe it could explore how the tribe reacts to the news, and how Laval himself prepares for fatherhood. It could also add new elements to the existing relationships in the 'legends of chima' world.