I’ve also added in a ticket for adding Avro support which should enable ‘external source’ querying for a variety of ecosystems:
Source / Service
S3 / Athena
Cloud Storage / BigQuery
Azure Storage / HDInsight
https://github.com/snowplow/kinesis-s3/issues/99
Previous discussion on how Avro/Parquet could fit into the pipeline here:
http://discourse.snowplow.io/t/optionally-support-avro-and-the-confluent-schema-registry-for-kafka/1127/9