Recently, Nintendo has posted very restrictive guidelines for how community tournaments can be run. You can read the guidelines in detail at the link above, but the main takeaway is that these restrictions will severely injure tournaments in the future if these rules are followed.
Tournament organizers are planning to continue running tournaments as they always have to see what Nintendo's response will be.
What can we as a community do about this? Well, we can't be quiet. We have to make a huge stink about it the moment Nintendo shuts down a tournament for breaking these awful guidelines. The future looks rough, but it ain't over until the community gives up so don't give up!