Good question. I thought about it and formed an approximate BGL Roadmap, community is welcome to check and give advice:

Tactical tasks (approx. time):
- Stress-test (let's make transaction contest, rules would be announced soon) (September);
- Technical issues (unit tests, code sync with BTC codebase, automated builds) (September-November);
- Software (wallets) - we are going to make hackatons (October-November);
- Infrastructural growth (node growth incentivizing, as bitnodes did with goal of 5000 nodes) (October);
- Cross-chain and DeFi integration (WBGL for staking/borrowing and DEX);
- Framework/DAO for community governance for BGL public wallet and project (grants for project development);

Strategic priorities:
- Core team expansion and formation;
- Marketing activities, social media channels;

plan would be updated, please post any suggestions.